Photocatalytic Degradation of Methylene Blue Dye Using Chitosan Silica Composite

Abstract

The ability of chitosan silica composite for the degradation of methylene blue dye from aqueous solution is studied by direct sunlight irradiation. Batch mode adsorption experiments are carried out to know the degradation capacity of the composite. Maximum removal efficiency 89.05 % of methylene blue is achieved at pH 10 with composite dosage of 0.1 g. Langmuir and Freundlich adsorption isotherm models are used to fit the obtained adsorption data. The maximum adsorption capacity is found to be 11.467 mg/g for the adsorption of methylene blue. The kinetic data is well fitted with pseudo first order kinetics. Degradation ability of methylene blue is confirmed by UV spectra studies.

γ-Fe2O3 NANOPARTICLES IMMOBILIZED IN SiO2 AEROGEL SYNTHESIZED FROM RICE HUSK ASH FOR PHOTOFENTON LIKE DEGRADATION OF RHODAMINE B

“…green chemistry and cheap and environmentally friendly photocatalysts, the use of silica sources from plants for synthesis of silica-based or so-called biogenic materials can be applied theoretically 9 . Biogenic silica material will have advantages in terms of the use of recyclable materials.…”